Loom harness cam block



ll, 'I J; J. BROOKS ETAL 2,415,623

LOOM HARNESS CAM BLOCK Fild March 28, 1945 Inientor er 7. fifQO/KS 4 lat/2e?" J. flazllaw'ay,

1 Attorneys Patented Feb. 11, 1947 UNiTED v .LOOM HARNESS CAM BLOCK I Jasper J. Brooks-and Luther J. Holloway, Bemis, Tenn.

Application March 28, 1945,:ser'ia1 norsssnsi 4 Claims.

This invention relates particularly to textile V looms and has for an object to provide a block upon which the harness control cam rides.

Another object of the invention is to provide a block to substitute for the rollers upon which loom harness control cams ride.

A further object of our invention is to provide means in a loom for eliminating lash therein and thereby provide smoother and more perfect weavmg.

Another object of the invention is to provide means in a loom whereby the noise of operation is very greatly reduced.

A still further object of the invention is to provide a rocker block formed of treated wood and upon which loom cams seat and operate,

And another object of our invention is to provide such a block with a plurality of faces upon which a cam may alternately seat.

Other features and advantages will become more readily apparent from the following description and the accompanying illustrative drawing in which:

Figure 1 is an elevational view of a portion of a loom embracing our invention,

Figure 2 is a section on line 2-2 thereof, and

Figure 3 is a perspective view of our cam riding block.

In the following specification as well as in the accompanying drawing like parts are designated by like reference characters and in which It, indicates our rocker block, which we substitute for the common roller upon which the cams II and (2, of the loom harness control members l3 and [4, usually ride. Such rollers wear out rapidly and also wear out the pins upon which they are rotatably mounted and wear and distort the faces of cams riding thereon, all of which sooner or later seriously affects the operation of the loom and the quality of its output. We have overcome these difficulties to a very large extent by designing of our block 10, the four peripheral faces l5, I6, I! and I8, which are formed concave to an are equal to that of the peripheral surfaces II and I2, of the cams II and I2. The block 10, is center bored as at Hi, to receive the pin 20, upon which it rocks. The said block faces 15 to l8, are provided with oil bores 2 l all of which extend through to the center bore l9, and through means of which, when any one of said faces 55 to l8,

are in use and are oiled, the lubricant will run through to lubricate the pin 20.

Our block is formed of an especially treated oil soaked hard wood and the faces thereof are of the same width, or if anything slightly wider,

than the faces of the cams which ride thereupon, whereby no ridges may possibly be worn in the cams through long use. The riding of a cam over a face of our block is perfectly smooth and noiseless, producing no lash or lost motion, as all wear upon the block is equal throughout the full length of its concave face and therefore must continue to snugly contact the cam at all times. The rocking motion of the block upon its pin is so slight that wear between these members is almost imperceptible, even after long use.

While we have designed our rocker block especially for loo-m cam use, it is very obvious that it may be used in almost any place as a substitute for a roller upon which a cam wheel bears.

It is thought that persons skilled in the art to which the invention relates will be able to obtain a, clear understanding of the invention after considering the description in connection with the drawing. Therefore, a more lengthy description is regarded as unnecessary.

Minor changes in shape, size and rearrangement of details and parts such as come within the purview of the invention claimed may be resorted to, in actual practice, if desired.

Having now described our invention, that which we claim as new'and desire to procure by Letters Patent is:

1. A rocker block for looms having a circular operating cam and a rocker arm oscillated thereby, consisting of a block pivoted to said rocker arm, said block having a central aperture, a, plurality of identical, concave faces upon the periphery of said block at equal distances from the pivot of said block, said faces being selectively positioned for continuous engagement by said cam.

2. A rocker block for looms having a circular operating cam and a rocker arm oscillated thereby, consistin of a block pivoted to said rocker arm, said block having a central aperture, a plurality of identical, concave faces upon the periphery'of said block at equal distances from the pivot of said block, said faces being selectively positioned for continuous engagement by said cam, and a lubricating passage extending from said central aperture to the mid-point of each face;

3. A rocker block for looms having a circular operating cam and a rocker arm oscillated thereby, consisting of a block pivoted to said rocker arm, said block having a central aperture, 3, plurality of identical, concave faces upon the periphery of said block at equal distances from the pivot of said block, said faces being selectively positioned for continuous engagement by said cam,

the concave faces of said block being of substantially equal radius with the cam, and engaging the cam throughout the entire surface of the face. REFERENCES CITED 4. A rocker block for looms having a circular The following references are of record in the operating cam and a, rocker arm oscillated therefil f thi at by, consisting of a block pivoted to said rocker 5 s p ent arm, said block having a central aperture, 8, plu- UNITED STATES PATENTS rality of identical, concave faces upon the periph- Number Name Date ery of said block at equal distances from the piv 2,653 Bigelow May 30 1842 of said block, said faces being selectively pos 732,570 Lacey F b,14 ,1905 tioned for continuous engagement by s id ca 10 1,859,457 Newhouse May 24, 1932 said block being freely journalled by its central 213,553 Eastwood Mar, 25, 1879 apelgture on a lateral pin extending from said 500,523 Word n et al June 27, 1893 rue er, whereby said block may rock slightly upon said pivot pin to accommodate itself to the chang- FOREIGN PATENTS ing angularity of the cam thrust thereon. 15 Number Country Date JASPER J. BROOKS. 1,822 British 1860 LUTHER J. HOLLOWAY. 

